1
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following is NOT a correct expression for an ideal gas?

[$$\mathrm{C_p}=$$ Molar specific heat of a gas at constant pressure,

$$\mathrm{C_v}=$$ Molar specific heat of a gas at constant volume,

$$\mathrm{Y}=$$ Ratio of two specific heats of a gas,

$$\mathrm{R}=$$ Universal gas constant]

A
$$C_v=C_p+R$$
B
$$R=C_v(\gamma-1)$$
C
$$\frac{C_v}{\mathrm{C}_{\mathrm{p}}}=\frac{1}{\gamma}$$
D
$$R=\frac{C_{\mathrm{p}}(\gamma-1)}{\gamma}$$
2
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The molecular masses of helium and oxygen are 4 and 32 respectively. The ratio of r.m.s. speed of helium at 327$$^\circ$$ to r.m.s. speed of oxygen at 27$$^\circ$$ will be

A
1 : 6
B
8 : 1
C
1 : 8
D
4 : 1
3
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following p-V diagram is correct for an isochoric process:

A
IV
B
II
C
III
D
I
4
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Assume that for solar radiation, surface temperature of the sun is $$6000 \mathrm{~K}$$. If Wien's constant 'b' is $$2.897 \times 10^{-3} \mathrm{~mK}$$, the value of maximum wavelength will be

A
4828$$\mathop A\limits^o$$
B
3648$$\mathop A\limits^o$$
C
6400$$\mathop A\limits^o$$
D
5890$$\mathop A\limits^o$$
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